The position of a runner is given by s left parenthesis t right parenthesis equals 7 t squared metres from the starting point, t minutes after they begin to run. What is the runner's velocity at t = 5 minutes?

A car is driving away from the base of an 80-meter-tall building. a. Write an equation relating x and y. b. Find the value of y when x = 60.

During a thunderstorm you see lightning before you hear thunder.  The distance d between you and the storm is given as the d = 600t, where d is in feet and t is given in seconds.  How far away is the storm if you hear thunder 10 seconds after you see the lightning?

4) The position of an time in seconds the object has been in motion. How long (to the nearest tenth) will it take the object to = 2t2- 3t, where s is in meters and t is the object moving in a straight line is given by s move 14 meters? 302

Show each step clearly please

step b-Calculate D(4). Round your answer to two decimal places.) D(4) =